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utf8-norm, validate and normalize UTF-8 Unicode data
Version 1.1.0 licensed GPLv3. (C) 2019 Leonora Tindall <email@example.com>
Fast command line Unicode normalization, supporting stream safety transformations as well
as NFC, NFD, NFKD, and NFKC. Exits with failure if the incoming stream is not valid UTF-8.
Usage: utf8-norm [--nfc | --nfd | --nfkc | --nfkd] [--stream-safe] [--crlf] <infile> <outfile>
<infile> (default stdin) - file from which to read bytes.
<outfile> (default stdout) - file to which to write normalized Unicode.
-w, --crlf - write CRLF (Windows) instead of LF only (Unix) at the end of lines.
-d, --nfd - write NFD (canonical decomposition).
-D, --nfkd - write NFKD (compatibility decomposition).
-c, --nfc - write NFC (canonical composition computed from NFD). This is the default.
-C, --nfkc - write NFKC (canonical composition computed from NFC).
-s, --stream-safe - write stream-safe bytes (Conjoining Grapheme Joiners, UAX15-D4).
-b, --buffered - read the entire input file into memory before operating on it.
-V, --version - output version information and exit.
utf8-norm operates linewise on the input unless --buffered is specified.
The --buffered option is primarily useful for reading and writing to the same file. It will
read bytes from the input until end of file and only then begin processing lines of the
Write the contents of input.txt, compatibly decomposed, with CRLF line endings,
utf8-norm --nfkd --crlf input.txt output.txt
Normalize file.md, in the canonical composition, buffering the file in memory to
avoid overwriting it with zeros:
utf8-norm --buffered file.md file.md
Emit the output of my_program to stdout, in the canonical composition, linewise.
my_program | utf8-norm
Buffer the entire output of my_program in memory, and emit it to
my_program.output in the canonical composition after receiving end-of-file.
my_program | utf8-norm --buffered - my_program.out
utf8-norm was created at Rust Belt Rust 2019 in Dayton, OH. Thanks to @j41manning for her
excellent talk regarding Unicode handling in Rust.
Natively install as `cargo install utf8-norm` or from your distribution's package manager.